As an additional cost to cast this spell, choose a number between 0 and 5.Liquid Fire deals X damage to target creature and 5 minus X damage to that creature's controller, where X is the chosen number.

Shower of Coals deals 2 damage to each of up to three targets.Threshold — Shower of Coals deals 4 damage to each of those permanents and/or players instead if seven or more cards are in your graveyard.